+----[ Lucas Carey <lcarey@odd.bio.sunysb.edu> (28.Jan.2004 11:57): | | You should be fine using -np 3 instead of -np2. MPICH will | start up the third process on the master. Also, try the | cvs version if you have any troubles, as it contains a lot | of bugfixes. You can get a nightly tarball from: | http://mpiblast.sf.net/mpiblast-latest.tar.gz | -Lucas | +----] Thanks Lucas, that did it! Although I have yet to understand the output of mpiblast --debug, I can now see CPU activity increase in the master, coincident with the start of a mpiblast process. I'm still confused as to what is happening ... -np 3 with 2 database segments? But perhaps it's just something like: process 0 -> master (management) process 1 -> node (process execution) process 2 -> master, now acting as a node (process execution) Is this documented somewhere? Where have I missed reading? :) Fernan -- F e r n a n A g u e r o http://genoma.unsam.edu.ar/~fernan